Spellseeker is a rare Creature — Human Wizard card from Secret Lair Drop (SLD), collector number 1165. Current market price: $25.97 (foil $27.72), TCGplayer market prices via Scryfall.
When this creature enters, you may search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, then shuffle.